rustlings/old_curriculum/functions/functions5.rs
2018-04-26 21:29:11 +02:00

45 lines
527 B
Rust

// functions5.rs
// Make me compile! Scroll down for hints :)
fn main() {
let answer = square(3);
println!("The answer is {}", answer);
}
fn square(num: i32) -> i32 {
num * num;
}
// This is a really common error that can be fixed by removing one character.
// It happens because Rust distinguishes between expressions and statements: expressions return
// a value and statements don't. We want to return a value from the `square` function, but it
// isn't returning one right now...